Knob lock



"msam J. MONTGOMERY Aug. 258, 11923.

I KNOB LOCK Filed Feb. 26, 1919 I INVENTOR il/V fliowmmmx Patented Aug.28, 1923.

KNOB LOCK.

Application fildFebruary 26,1919. serial No. 279,360.

T aZZwfi-Om it may concern:

Be it known that I, JOHN MONTGOMERY, a subject of the King of GreatBritain, residing at Toronto, county of York, Province of Ontario,Canada, have invented a certain new and useful Improvement in KnobLocks, and declare the following to be a ,full, clear, and exactdescription of the same, such as will enable others skilled in the artto which it pertains to make and use the same, reference being had tothe accompanying drawings, which form a part of this specification. Myinvention relates to knob locks and an object of my improvements is toprovide a cheap and eifective means for locking the knob of a door.

I secure this object in the device illustrated in the accompanyingdrawings in which, Figure 1 is a sectional View of a knob lock 0therefor embodying my invention.

Figure 2 is a section on the line II-II Fig. 1. V

Figure 3 is a plan view of the knoband lock.

Figure 4 is a section of the line IV-IV Fig. 1. V

Figure 5 is a detail view illustrating the bolt actuating cam.

Figure 6 is a plan View of the same. Figure 7 is a side elevation of thesleeve bearing for the escutcheon.

Fig. 8 is a section similar to that of Fig. 4 but taken on a planethrough the axis of the set-screw a.

A is a door of a usual construction and B is a latching and lockingbolt. 6 is the usual knob spindle by which the bolt 13 is actuated byany form of mechanism such as, the lug g. a is a knob secured to thespindle e in the usual way by a set screw a passing radially thru itsshank a and engaging said spindle. a is a dovetailed slot at theperiphery of the shank a extending parallel to the axis of the shank. cis an escutcheon extending over the shank a and surrounding the same andover the inner end of the slot a a is a bolt fitting in the dovetailedslot a and extending above the surface of the shank a. This is formed atits upper edge to be engaged by the thumb or finger of the operator. Thebolt a is enlarged at its inner portion so as to fit in the enlargedinner 'portion of the dovetailed slota 0 is a slot extending inward fromthe edge of the cylindrical portion of the escutcheon which ex tendsover the shank a and o'verthe inner end of the slot (219. In the normalposition of the parts the slot 0 registers with the slot of and forms anextension of the narrow upper portion of the same. The bolt a may slidein the slot a to clear the escutcheon a completely, in which case theknob is free to turn, or it may be thrust forward by the finger of theoperator to engage in the slot 0 in which case the shank a is locked bythe 6 engagement of the bolt a in the slots 0 and a thus preventing therelative angular movement of said parts.

The sleeve, or bearing, f is screw-threaded around its outer peripheryand has a lug f 7 which fits into a lug A in the door to hold saidsleeve from rotation. Each of the escutcheons c is provided with acentral aperture with screw-threads adapted to engage the threads upon asleeve 7. There is a screw d which extends thru a screw hole near theperiphery of the escutcheon 0 and extends thru the door engaging thecorre- Zponding escutcheon on the other side of the oor.

By this construction the escutcheons can be adjusted accurately to thesurface of the doors of various thicknesses by turning them upon thesleeve and screwing them in or out as may be required. When adjusted tothe proper position one or more screws d are inserted in place andtightened and holds the escutcheon in its adjusted position.

The sleeves may be accurately fitted in the apertures of the door andthe escutcheons bear all around their periphery.

hat I claim is: r

1. In a device of the class described, th combination with a door havinga transversely extending aperture in each surface thereof, saidapertures being co-axial with each other, a screw threaded sleeveengaging in each of said apertures, an escutcheon upon each side of saiddoor having internal screw threads engaging the screw threads of saidsleeves, a spindle passing axially through said sleeves, the bores ofsaid sleeves being 1 large enough to permit sufficient clearance betweensaid walls and said spindle, a knob fixed upon each end of said spindleand ro- 10 tatably bearing in the adjacent escutcheon.

2. In a device of the class described, the combination with a. doorhaving a transversely extending aperture ineaoh surface thereof, saidapertures being co-axial with each other, a screw threaded sleeveengaging in each of said apertures, an escutcheon upon each'side of saiddoor having internal screw threads engaging the screw threads of saidsleeves, a spindle passing axially through said sleeves, the bores ofsaid sleeves being large enough to permit sufficient clearance betweensaid Walls and said spindle, a knob fixed upon each end of said spindleand rotatably bearing in the adjacent escutcheon and a screw engagingeach of H said escutcheons and the door to prevent rotation of theescutcheon.

' 3. The combination of claim '1, one of said apertures being providedwith a slot in its Wall opening outward and said sleeve having a lugadapted to be inserted into said slot from the outside and closelyengage therein. 7

In testimony whereof, I sign this speci- 20 fication.

JOHN MONTGOMERY.

